고급 배수 시스템, Inc.
MX ˙ BMV ˙ US00790R1041
SecurityMX:WMS / Advanced Drainage Systems, Inc.
InstitutionMarshall Wace, Llp
Latest Disclosed Ownership6,936 shares
Latest Disclosed Value $ 951,134
Marshall Wace, Llp reports 50.27% decrease in ownership of WMS / Advanced Drainage Systems, Inc.

On May 14, 2026 - Marshall Wace, Llp filed a 13F-HR form disclosing ownership of 6,936 shares of Advanced Drainage Systems, Inc. (MX:WMS) valued at $951,134 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 13,947 shares of Advanced Drainage Systems, Inc.. This represents a change in shares of -50.27% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F ADVANCED DRAINAG COMMON STOCK 00790R104 6,936 -7,011 -50.27 951 -52.90 0.0004
2026-02-13 2025-12-31 13F ADVANCED DRAINAG COMMON STOCK 00790R104 13,947 -1,505 -9.74 2,020 -5.79 0.0018
2025-11-13 2025-09-30 13F ADVANCED DRAINAG COMMON STOCK 00790R104 15,452 15,452 2,143 0.0022
2024-08-14 2024-06-30 13F ADVANCED DRAINAG COMMON STOCK 00790R104 0 -5,229 -100.00 0 -100.00
2024-05-15 2024-03-31 13F ADVANCED DRAINAG COMMON STOCK 00790R104 5,229 1,805 52.72 901 87.11 0.0014
2024-02-14 2023-12-31 13F ADVANCED DRAINAG COMMON STOCK 00790R104 3,424 3,424 482 0.0008
2023-05-15 2023-03-31 13F ADVANCED DRAINAG COMMON STOCK 00790R104 0 -448,387 -100.00 0 -100.00
2023-02-14 2022-12-31 13F ADVANCED DRAINAG COMMON STOCK 00790R104 448,387 322,705 256.76 36,754 135.12 0.0827
2022-11-14 2022-09-30 13F ADVANCED DRAINAG COMMON STOCK 00790R104 125,682 125,682 15,632 0.0343
2021-08-13 2021-06-30 13F ADVANCED DRAINAG COMMON STOCK 00790R104 0 -169,843 -100.00 0 -100.00
2021-05-17 2021-03-31 13F ADVANCED DRAINAG COMMON STOCK 00790R104 169,843 169,843 17,560 0.0805
2021-02-16 2020-12-31 13F ADVANCED DRAINAG COMMON STOCK 00790R104 0 -24,996 -100.00 0 -100.00
2020-11-16 2020-09-30 13F ADVANCED DRAINAG COMMON STOCK 00790R104 24,996 24,996 1,561 0.0100
2019-11-14 2019-09-30 13F ADVANCED DRAINAG COMMON STOCK 00790R104 0 -262,474 -100.00 0 -100.00
2019-08-14 2019-06-30 13F ADVANCED DRAINAG COMMON STOCK 00790R104 262,474 -443,444 -62.82 8,607 -52.69 0.0708
2019-05-29 2019-03-31 13F/A-1 ADVANCED DRAINAG COMMON STOCK 00790R104 705,918 661,733 1,497.64 18,191 1,598.51 0.1710
2019-05-14 2019-03-31 13F ADVANCED DRAINAG COMMON STOCK 00790R104 705,918 661,733 18,191
2019-02-14 2018-12-31 13F ADVANCED DRAINAG COMMON STOCK 00790R104 44,185 44,185 -93.74 1,071 -94.11 0.0109
2017-02-10 2016-12-31 13F ADVANCED DRAINAG COMMON STOCK 00790R104 0 -43,671 -100.00 0 -100.00
2016-11-10 2016-09-30 13F ADVANCED DRAINAG COMMON STOCK 00790R104 43,671 43,671 1,051 0.0075
2016-08-12 2016-06-30 13F ADVANCED DRAINAG COMMON STOCK 00790R104 0 -43,984 -100.00 0 -100.00
2016-05-13 2016-03-31 13F ADVANCED DRAINAG COMMON STOCK 00790R104 43,984 24,185 122.15 937 96.85 0.0090
2016-02-10 2015-12-31 13F ADVANCED DRAINAG COMMON STOCK 00790R104 19,799 19,799 -54.99 476 -49.20 0.0045
2015-08-14 2015-06-30 13F ADVANCED DRAINAG COMMON STOCK 00790R104 0 -162,227 -100.00 0 -100.00
2015-05-11 2015-03-31 13F ADVANCED DRAINAG COMMON STOCK 00790R104 162,227 -121,469 -42.82 4,857 -25.49 0.0633
2015-02-17 2014-12-31 13F ADVANCED DRAINAG COMMON STOCK 00790R104 283,696 263,992 1,339.79 6,519 1,196.02 0.0861
2013-08-06 2013-06-30 13F WMS INDS COMMON STOCK 929297109 19,704 19,704 503 0.0301
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.